Thermodynamical analogues in quantum information theory

Details Thermodynamical analogues in quantum information theory Thermodynamical analogues in quantum information theory

2001-07-05

arxiv.org/abs/quant-ph/0107026v1

Optics and Spectroscopy 91 (2001) 394

Physics

Quantum Physics

RevTeX, 10 pages, no figures

Scientific paper

10.1134/1.1405213

The first step in quantum information theory is the identification of entanglement as a valuable resource. The next step is learning how to exploit this resource efficiently. We learn how to exploit entanglement efficiently by applying analogues of thermodynamical concepts. These concepts include reversibility, entropy, and the distinction between intensive and extensive quantities. We discuss some of these analogues and show how they lead to a measure of entanglement for pure states. We also ask whether these analogues are more than analogues, and note that, l o c a l l y, entropy of entanglement is thermodynamical entropy.

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